code cleaning

Showcase/ShowcaseSnapshotTests/VitaminTestCase.swift

@@ -0,0 +1,19 @@
+import Foundation
+import XCTest
+import SnapshotTesting
+
+class VitaminTestCase: XCTestCase {
+  // The percentage a pixel must match the source pixel to be considered a match. [98-99% mimics the precision of the human eye.](http://zschuessler.github.io/DeltaE/learn/#toc-defining-delta-e)
+  var perceptualPrecision: Float = 0.99
+
+  override class func setUp() {
+    // Helix Visual Merge Tool (P4Merge) is a versatile tool for three-way merging and side-by-side file comparisons. It's useful for visualizing merges, accessing detailed file histories, and comparing a wide range of image and text files.
+    // You can find more about it here: https://www.perforce.com/products/helix-core-apps/merge-diff-tool-p4merge
+    // We're using this free tool to simplify the process of diffing two image or text files.
+    // To use it effectively, make sure to have P4Merge installed on your system.
+    SnapshotTesting.diffTool = "/Applications/p4merge.app/Contents/MacOS/p4merge"
+
+    // In order to update the test fixture you just have to un comment the code below then recomment it before commit.
+//    SnapshotTesting.isRecording = true
+  }
+}